No, it's not a fake. According to TV station KATU, this happened back in December 2008. They called it a "bizarre incident" in which two charter buses collided while nosing down an icy Seattle hill, sending both of them crashing through a metal railing above the freeway. The bus in the photo hang 30 feet above the Interstate before it was towed to safety.

The Google camera car must have just been in the right place at the right time, I guess.